> With PBT at 0, and in SSB, the main receiver always has the
> bottom of each filter set at 200 hertz. The Sub-receiver
> sets this to a higher value.
The low end on the sub-receiver isn't behaving like it's simply fixed in a
different position. It appears to shift even higher as the bandwidth is
narrowed. At 3 Khz BW it takes around 50 Hz PBT shift on the Sub to make
the two receivers sound about the same, which isn't unreasonable. But at
1.8 Khz it takes on the order of a 600 Hz shift. That's more than a slight
difference, and indicates to me that the filter in the sub is not only
getting narrower (which you would expect), but is also shifting position
(which you wouldn't expect).
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